"टेलीग्राफ": अवतरणों में अंतर

! दिन !! कहाँ <ref>[{{Cite web |url=http://distantwriting.co.uk/companiesandforeigntraffic.html |title=A History of the Telegraph Companies in Britain between 1838-1868 by Steven Roberts] |access-date=13 फ़रवरी 2017 |archive-url=https://web.archive.org/web/20170426214400/http://distantwriting.co.uk/companiesandforeigntraffic.html |archive-date=26 अप्रैल 2017 |url-status=live }}</ref>

* [https://web.archive.org/web/20130927210948/http://www.porthcurno.org.uk/ The Porthcurno Telegraph Museum] The biggest Telegraph station in the world, now a museum

* [https://web.archive.org/web/20060502202633/http://eh.net/encyclopedia/article/nonnenmacher.industry.telegraphic.us History of the U.S. Telegraphic Industry] from Economic History.net

* [https://web.archive.org/web/20120311215553/http://distantwriting.co.uk/ Distant Writing]&nbsp;— The History of the Telegraph Companies in Britain between 1838 and 1868

* [https://web.archive.org/web/20070109033423/http://www.remuseum.org.uk/rem_his_special.htm Royal Engineers Museum&nbsp;— Telegraph Services]

* [https://web.archive.org/web/20111231070941/http://americanhistory.si.edu/archives/d8073.htm Anglo-American Telegraph Company, Ltd. Records, 1866&ndash;1947] Archives Center, National Museum of American History, Smithsonian Institution.

* [https://web.archive.org/web/20110913021026/http://invention.smithsonian.org/resources/fa_wu_index.aspx Western Union Telegraph Company Records, 1820–1995] Archives Center, National Museum of American History, Smithsonian Institution.

* [https://web.archive.org/web/20120420040611/http://www.technikum29.de/en/communication/fax Early telegraphy and fax engineering, still operable in a German computer museum]

* [https://web.archive.org/web/20150404034754/http://www.nytimes.com/2006/02/06/technology/06telegram.html?scp=1&sq=Telegram%20Falls%20Silent%20Stop%20Era%20Ends%20Stop&st=Search "Telegram Falls Silent Stop Era Ends Stop"], The New York Times, February 6, 2006